Hardware What does my H2testw results says?

[KiteQ8]

Hey guys, I had problems with installing .cia files on my cfw 3ds after updating to the latest version 11.13, and I have read that I must use H2tetsw tool to get a general knowledge about the underlying problem!

Warning: Only 30424 of 30425 MByte tested.
The media is likely to be defective.
8.9 GByte OK (18691753 sectors)
20.7 GByte DATA LOST (43616599 sectors)
Details:0 KByte overwritten (0 sectors)
0 KByte slightly changed (< 8 bit/sector, 0 sectors)
20.7 GByte corrupted (43616599 sectors)
0 KByte aliased memory (0 sectors)
First error at offset: 0x00000000868a9800
Expected: 0x00000000868a9800
Found: 0xef9c3dfd9f0d654a
H2testw version 1.3
Writing speed: 19.7 MByte/s
Reading speed: 18.0 MByte/s
H2testw v1.4

Can someone help me please? Do I need a new micro SD card?
And if my SD card is busted, how did that happen? I thought I got it from it a legit local electronics store!

 

[Roamin64]

Do you need us to hold you by the hand too ? Clearly it says your media is defective , and that 20.7 GB of data was lost. Your card is dead. Not sure what policies are for warranty in your country , in north america everything is guaranteed 1 year , in europe its 2.

 

[ChiefReginod]

Whether it's fake or genuine but dead, you're going to have to replace it either way. Bite the bullet and buy a new one. There's no way to fix defective SD cards.

 

[KiteQ8]

@Roamin64 @ChiefReginod Thank you for your replies, I will get a new one today. But is there anything I should do before copying and pasting my files into the new card?